EP2189575B1 - Jack-Up Offshore-Plattform und Verfahren - Google Patents
Jack-Up Offshore-Plattform und Verfahren Download PDFInfo
- Publication number
- EP2189575B1 EP2189575B1 EP08169404.4A EP08169404A EP2189575B1 EP 2189575 B1 EP2189575 B1 EP 2189575B1 EP 08169404 A EP08169404 A EP 08169404A EP 2189575 B1 EP2189575 B1 EP 2189575B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- jack
- counterbalancing
- boom
- offshore platform
- platform
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims description 7
- 238000010276 construction Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B17/0034—Maintenance, repair or inspection of offshore constructions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C17/00—Overhead travelling cranes comprising one or more substantially horizontal girders the ends of which are directly supported by wheels or rollers running on tracks carried by spaced supports
- B66C17/06—Overhead travelling cranes comprising one or more substantially horizontal girders the ends of which are directly supported by wheels or rollers running on tracks carried by spaced supports specially adapted for particular purposes, e.g. in foundries, forges; combined with auxiliary apparatus serving particular purposes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
- B66C23/185—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes for use erecting wind turbines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
- B66C23/36—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes
- B66C23/52—Floating cranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/72—Counterweights or supports for balancing lifting couples
- B66C23/74—Counterweights or supports for balancing lifting couples separate from jib
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/10—Assembly of wind motors; Arrangements for erecting wind motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2240/00—Components
- F05B2240/90—Mounting on supporting structures or systems
- F05B2240/95—Mounting on supporting structures or systems offshore
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/727—Offshore wind turbines
Definitions
- the invention relates to a jack-up offshore platform, on which is provided a lifting crane for lifting a load, which lifting crane comprises counterbalancing means for counterbalancing the load.
- the invention also relates to a method of repositioning a load from a jack-up offshore platform and to a use of such jack-up offshore platform.
- a typical offshore wind turbine for instance comprises a nacelle supported by a tower of more than 100 meters high above sea level.
- a hub is connected to the nacelle for holding rotor blades, which can have a length of 70 meters and more.
- the nacelle alone typically accounts for 350 tons in weight.
- US 4,012,917 A discloses an oil drilling platform supported by prepositioned template legs, the distances between the upper ends of which are spanned by bridge beams of open framework construction.
- the bridge beams act in supporting the platform when it is raised above water level, and further define a grid like array of drilling locations.
- the platform comprises a crane of known construction.
- GB 857 961 A discloses a jack-up platform provided with a crane.
- US 2002/0079278 A1 discloses a jack-up platform provided with a lifting crane.
- the lifting crane is supported by a jack-house integrated in the work deck of the platform.
- the jack-house is reinforced to allow the placement of a crane tub provided with a flange for the rotatable engagement of the crane upon the flange.
- the crane disclosed is provided with the usual counterweights to balance loads.
- GB 763 864 A discloses a jack-up platform provided with a lifting crane and a derrick structure to support heavy loads.
- US 4,652,177 A discloses a jack-up off-shore platform comprising a lifting crane that is rotatably mounted about the guide tower of a leg of the off-shore platform in order to save space.
- US 2008/0247827 A finally discloses a crane support for the crane of a jack-up platform.
- the crane-support allows movement along tracks provided on the work deck of the platform.
- WO 2007/030015 A2 discloses a tie-back system for cranes.
- tie back rods are connected to pad eyes, that are fixed to the platform.
- US 4,664,269A discloses an offshore crane for heavy loads. Luffing wires of the crane are disconnected from the crane and extended by guy wires that are attached to a work deck of a pontoon.
- a jack-up offshore platform in accordance with claim 1.
- a lifting crane for lifting a load which lifting crane comprises counterbalancing means for counterbalancing the load, whereby the counterbalancing means are connected to the jack-up offshore platform.
- the counterbalancing means are connected to the jack-up platform.
- the counterweight needed to counterbalance the load can be reduced compared to the state of the art, or even deleted altogether.
- a larger load can be lifted relative to the state of the art platform and crane.
- An additional advantage of the jack-up offshore platform according to the invention is that its lifting crane takes up less space of the jack-up offshore platform and makes assembling or servicing structures at sea less expensive and easier to perform.
- Providing counterbalancing means that are, in operation, connected to the jack-up offshore platform has not been attempted before since lifting cranes usually move, in particular rotate, when repositioning a load. Connected counterbalancing means may limit the movement of the lifting crane.
- the advantages provided by a decreased counterweight and increased workspace are such however that a more effective jack-up offshore platform is achieved by the invention. With a more effective platform is meant a platform that is able to operate faster, easier and at reduced cost.
- the counterbalancing means comprise at least one counterbalancing cable attached to the lifting crane and connected to the platform.
- the at least one counterbalancing cable transfers the counterbalancing forces into the jack-up offshore platform.
- the counterbalancing means are connected to the platform by first connection means provided on the cable, and second connection means provided on the jack-up offshore platform.
- the first and second connection means cooperate to achieve the connection. This embodiment allows for easy connecting and disconnecting of the counterbalancing cable to and from the jack-up offshore platform.
- the counterbalancing means may be connected to the jack-up offshore platform at at least two spaced apart connection positions. This allows to use the lifting crane in at least two different positions. For example, with the lifting crane in a first position, a load can be lifted from a cargo ship onto a particular location of the platform, and, with the lifting crane in a second position, the load can be repositioned to the structure at sea.
- the counterbalancing means are connected to the platform at two spaced apart connection positions.
- the lifting crane When servicing or assembling a structure at sea, such as a wind turbine, the lifting crane usually lifts parts from a first location, for example from a cargo ship or from the jack-up offshore platform, and positions the load at the preferred location of the structure. When these locations are at a substantial distance from each other, two spaced apart connection positions allow for effective use of the counterbalancing cables, whereas even more limited workspace of the jack-up offshore platform is used.
- the second connection means can be located at any position of choice of the jack-up offshore platform.
- the counterbalancing means may be connected to the platform nearby edges of the jack-up offshore platform. This saves even more workspace, as edges are usually not part of the workspace, or at least not used extensively.
- the counterbalancing means are movably connected to the jack-up offshore platform.
- the jack-up offshore platform comprise a guide, such as a cable-guide or a bar-guide, fixed to the platform.
- the first connection means may for instance be provided in the form of a hook that is connected to the cable-guide or bar-guide and will slide along the cable-guide or bar-guide when moving the lifting crane.
- a person skilled in the art may envisage other solutions to such a movable connection.
- the present invention does not demand or demands less connecting and disconnecting of the counterbalancing means during the use of the lifting crane.
- the connection between the counterbalancing means and the jack-up offshore platform can move relative to the platform, whereby the counterbalancing means can be used over a wider range of positions of the lifting crane.
- the counterbalancing means comprise a counterbalancing cable
- a preferred embodiment of the lifting crane comprises, in addition to the counterbalancing means, a counterweight, supported by the lifting crane.
- a lifting crane is able to move and rotate in its unconnected state (when it is not connected to the platform) in a number of stable configurations, eventually carrying a relatively small load.
- the counterweight of the present embodiment will typically be smaller than the counterweight of the known lifting crane, and therefore still saves weight and workspace.
- the distance between the counterweight and the lifted load is adjustable. This results in a more flexible lifting crane, as the counterbalancing couple exerted by the counterweight about lifted load can be adjusted, resulting in easy repositioning of loads.
- the lifting crane of the jack-up platform preferably comprises at least one sensor for detecting forces, and control means for counterbalancing the load such that the lifting crane remains in equilibrium on the basis of the outcome of the detected forces.
- the detected forces for a certain load can be influenced by changing the position of the lifting crane and/or by tightening or loosening the counteracting cable, and/or eventually also by tightening or loosening other cables provided between different parts of the lifting crane.
- the sensors and control means may also be used to find an equilibrium position of the crane in which the force in the counterbalancing means is about zero. If the detected force in the counterbalancing cable for instance is below a predetermined low value, the counterbalancing cable may be disconnected from the platform without the crane loosing its equilibrium.
- the sensors and control means may also be used to limit the stress in the counteracting cable to below a certain yield stress, in order to prevent fracture of the cable.
- the control means may also provide a signal, for example a sound or a light signal, to inform the user when a certain predetermined stress level is exceeded.
- the lifting crane of the jack-up platform according to the invention is able to lift loads higher than the known platform lifting crane.
- the lifting crane of the jack-up platform is particularly useful for lifting loads to a height between 50 and 150 meter, preferably between 60 and 130 meter and most preferably between 70 and 110 meter above the jack-up offshore platform.
- a jack-up offshore platform on which is provided such a lifting crane is particularly advantageous, as counterbalancing forces may be high.
- the lifting capacity of the lifting crane according to the invention may easily be enlarged, for instance by increasing the thickness of the counterbalancing cables and/or the number thereof. More or larger counteracting cables are still easier to transport, lighter and take up less workspace than when using more or larger counterweights, as is done in the state of the art.
- the lifting crane according to the invention comprises a first boom, movably supported by the jack-up offshore platform at its lower end, and may, in an embodiment, further comprise a third boom, hingedly connected to the first boom, for holding the load.
- This allows for a more flexible lifting crane, as loads can be lifted higher, without a longer first boom.
- transport of the lifting crane with higher capacity in terms of height to and from the platform is still easy to perform.
- the lifting crane comprises a first boom, movably supported by the jack-up offshore platform at its lower end, and a second boom, provided to space apart the counterbalancing cable and the first boom. Connecting the counterbalancing cable indirectly to the first boom by a second boom enlarges the effective arm of the counterbalancing force and thereby the couple exerted about the first boom. As a result, higher loads can be lifted and/or the at least one counterbalancing cable as well as the first and second connection means can be designed more lightweight, which results in cheaper transport of the lifting crane.
- the jack-up offshore platform according to the invention allows for supporting a lifting crane without a counterweight, and thus can be designed smaller or may provide an increased workspace of the jack-up offshore platform.
- the invention also relates to a method of repositioning a load from a jack-up offshore platform by a lifting crane in accordance with claim 8.
- the advantages of the method have already been elucidated in the context of describing the jack-up offshore platform above, and will not be repeated here.
- the invention finally relates to the use of a jack-up offshore platform according to the invention for assembling and servicing structures at sea. Especially when transport of a lifting crane is needed the invention is advantageous, as no or at least a smaller counterweight is needed. In particular assembling high structures, such as wind turbines, and/or heavy structures can be performed more easily with the jack-up offshore platform according to the invention.
- a jack-up offshore platform 1 located at sea nearby a semi-finished wind turbine 100, which is fixed by foundations 103 to a base 4.
- the jack-up offshore platform comprises supports 2, fixed by foundations 3 to the base 4, and a work deck 5.
- a lifting crane 10 is positioned on the work deck 5.
- the lifting crane 10 comprises a support 11, which allows for rotation of the lifting crane 10 relative to the jack-up offshore platform 1 about a vertical axis 12.
- the lifting crane furthermore comprises a frame 13.
- the frame 13 hingedly supports a first boom 14 and a second boom 15.
- a third boom 16 and a fourth boom 17 are hingedly supported nearby the top 14a of the first boom 14.
- a load 18, supported by a cargo ship 19, is connected to holding means 20 of the lifting crane 10.
- a lifting cable 21 is at a first end 21a connected to the third boom 16, guided over pulleys 22 and connected to a winch 23 at a second end 21b.
- the winch 23 is connected to the first boom 14 by a force sensor, which is not shown.
- a counterbalancing cable 24 is at its first end 24a connected to a first bar guide 25a, which first bar guide 25a is rigidly fixed to the jack-up offshore platform 1, nearby an edge 1a of the jack-up offshore platform 1.
- the cable 24 is guided over a pulley 26, fixed to the top 15a of the second boom 15 and connected to a winch 27 at a second end 24b.
- the winch 27 is connected to a force sensor 28, which force sensor is fixed to the frame 13 of the lifting crane 10.
- a first control cable 29 is at its first end 29a connected to the second boom 15 by a winch, which is not shown, nearby the pulley 26. At a second end 29b the first control cable 29 is fixed to an end 17a of the fourth boom 17.
- a second control cable 30 is at its first end 30a connected to the end 17a of the fourth boom 17 by a winch 31. At a second end 30b the cable 30 is fixed to an end 16b of the third boom 16.
- the lifting crane 10 comprises a counterweight 32, which is movably connected to the frame 13 by a support 33. The support 33 allows displacement the counterweight 32 closer to and further away from the lower end 14b of the first boom 14.
- the force sensor 28 is connected to a control system, which controls at least the winches 23, 27, 31 as a result of the level of the detected force.
- the load When lifting the load 18, the load will exert a couple about a lower end 14b of the first boom 14b. Both the counterbalancing cable 24 in cooperation with the first control cable 29, as well as the counterweight 32 will exert a counterbalancing couple about the lower end 14b of the first boom 14. As a result the first boom 14 is in moment equilibrium. If the first boom 14 and the third boom 16 are oriented with higher inclination, the couple exerted about the lower end 14b of the first boom 14 will decrease.
- the counterbalancing force in the counterbalancing cable 24 and the first control cable 29 will decrease, and, if the inclination of the first boom 14 and the third boom 16 increase sufficiently, the counterbalancing cable 24 and/or the first control cable 29 may even become slack, as the counterweight 32 is able to counterbalance the decreased couple exerted by the lifted load 18 about the lower end 14a of the first boom 14.
- the counterbalancing cable 24 may or may not now be disconnected from the first bar guide 25a.
- the lifting crane 10 With the first boom 14 and the third boom 16 in the inclined orientation, the lifting crane 10 may be rotated about the axis 12, e.g. by 180°.
- the third boom 16 and/or the first boom 14 may be lowered to position the load 18, e.g. a nacelle, on the semi-finished wind turbine 100.
- the load 18 e.g. a nacelle
- the counterbalancing force in the counterbalancing cable 24 and the first control cable 29 will increase.
- the first boom 14 of the lifting crane 10 does not comprise a third boom 16 or a fourth boom 17.
- the first control cable 29 is connected to the top 14a of the first 14 at its first end 29a.
- FIG 2 a top view on the jack-up offshore platform 1 according to the invention is shown.
- the counterbalancing cable 24 is connected to the second bar-guide 25b at its first end 24a by a hook 40.
- the first boom 14 as well as the third boom 16 is in an almost upright position, wherein the load 18 is counterbalanced by the counterweight 32.
- both the first boom 14 as well as the third boom 16 may be lowered, wherein during lowering counterbalancing force in the counterbalancing cable 24 will increase.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Jib Cranes (AREA)
Claims (10)
- Hub-Offshore-Plattform (1) mit einem Hebekran (10), der einen ersten Ausleger (14) aufweist, welcher von der Hub-Offshore-Plattform (1) an seinem unteren Ende beweglich getragen wird, um eine Last (18) anzuheben, wobei der Hebekran (10) Ausgleichsmittel (24, 26, 29, 30) zum Ausgleichen des Gewichts der von dem ersten Ausleger (14) des Hebekrans (10) zu hebenden Last (18) und zum Bereitstellen des ersten Auslegers (14) im momentanen Gleichgewicht aufweist, wobei die Ausgleichsmittel (24, 26, 29, 30) mindestens ein Ausgleichsseil (24) aufweisen, das an dem Hebekran (10) angebracht und mit der Plattform (1) verbunden ist, der Hebekran (10) ferner einen zweiten Ausleger (15) aufweist, der vorgesehen ist, um das Ausgleichsseil (24) in einem Abstand von dem ersten Ausleger (14) zu halten, wobei die Verbindung des Ausgleichsseils (24) mit der Hub-Offshore-Plattform (1) relativ zu der Hub-Offshore-Plattform (1) beweglich ist und erste Verbindungsmittel, die an dem Ausgleichsseil (24) vorgesehen sind, und zweite Verbindungsmittel, die an der Hub-Offshore-Plattform (1) vorgesehen sind, aufweist, wobei die zweiten Verbindungsmittel eine an der Plattform (1) befestigte Führung aufweisen.
- Hub-Offshore-Plattform nach Anspruch 1, wobei die bewegliche Verbindung des Ausgleichsseils (24) mit der Plattform (1) die Führung umfasst, die am Arbeitsdeck (5) der Plattform befestigt ist und mit dem ersten Verbindungsmittel, das am Seil vorgesehen ist, verschiebbar zusammenwirken kann.
- Hub-Offshore-Plattform nach Anspruch 2, wobei die Führung eine bogenförmige Stangenführung umfasst.
- Hub-Offshore-Plattform nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass der Hebekran (10) zusätzlich zu dem Ausgleichsseil (24) ein Gegengewicht (32) umfasst, das von dem Hebekran (10) getragen wird.
- Hub-Offshore-Plattform nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass der Hebekran (10) mindestens einen Sensor zum Erfassen von Kräften und Steuermittel zum Ausgleichen der Last durch Drehen des ersten Auslegers (14) aufweist, so dass der Hebekran (10), auf der Grundlage des Ergebnisses der erfassten Kräfte, im Gleichgewicht bleibt.
- Hub-Offshore-Plattform nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass der Hebekran (10) zum Heben von Lasten auf eine Höhe zwischen 50 und 150 Metern, vorzugsweise zwischen 60 und 130 Metern, am bevorzugtesten aber zwischen 70 und 110 Metern über der Hub-Offshore-Plattform (1) geeignet ist.
- Hub-Offshore-Plattform nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass der Hebekran (10) einen dritten Ausleger (16) aufweist, der mit dem ersten Ausleger (14) gelenkig verbunden ist, um die Last (18) zu halten.
- Verfahren zum Umsetzen einer Last (18) von einer Hub-Offshore-Plattform (1) durch einen Hebekran (10) mit einem ersten Ausleger (14), der an seinem unteren Ende von der Hub-Offshore-Plattform (1) beweglich getragen wird und mit Ausgleichsmitteln (24, 26, 29, 30) versehen ist, um das Gewicht der von dem ersten Ausleger (14) angehobenen Last (18) auszugleichen und den ersten Ausleger (14) in momentanes Gleichgewicht zu bringen, wobei die Ausgleichsmittel (24, 26, 29, 30) mindestens ein Ausgleichsseil (24) aufweisen, dessen Verbindung mit der Hub-Offshore-Plattform (1) relativ zu der Hub-Offshore-Plattform (1) beweglich ist, und erste Verbindungsmittel, die an dem Ausgleichsseil (24) vorgesehen sind, und zweite Verbindungsmittel, die an der Hub-Offshore-Plattform (1) vorgesehen sind, umfasst, wobei die zweiten Verbindungsmittel eine an der Plattform (1) befestigte Führung aufweisen, wobei der Hebekran (10) ferner einen zweiten Ausleger (15) aufweist, der vorgesehen ist, um das Ausgleichsseil (24) in einem Abstand von dem ersten Ausleger (14) zu halten, wobei das Verfahren folgende Schritte aufweist:- Verbinden des Ausgleichsseils (24) mit der an der Plattform (1) befestigten Führung;- Anheben der Last (18), wobei das Ausgleichsseil (24) die Last (18) ausbalanciert und den ersten Ausleger (14) im momentanen Gleichgewicht hält;- Positionieren der Last (18) so, dass das Ausgleichsseil (24) im Wesentlichen unbelastet ist;- Neupositionieren der Last (18), so dass der Hebekran (10) im Gleichgewicht bleibt;- beim Bewegen des Hebekrans, Bewegen des Ausgleichsseils (24), relativ zur Plattform (1), in der an der Hub-Offshore-Plattform (1) befestigten Führung;
und- Abladen der Last (18). - Einsatz einer Hub-Offshore-Plattform nach einem der Ansprüche 1 bis 7 zur Montage und Wartung einer Anlage auf See.
- Einsatz nach Anspruch 9, wobei das Ausgleichsseil (24) mit der an der Plattform (1) befestigten Führung verbunden und von dieser getrennt ist.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08169404.4A EP2189575B1 (de) | 2008-11-19 | 2008-11-19 | Jack-Up Offshore-Plattform und Verfahren |
US12/845,876 US20110017695A1 (en) | 2008-11-19 | 2010-07-29 | Jack-up offshore platform and a method for assembling and servicing a wind turbine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08169404.4A EP2189575B1 (de) | 2008-11-19 | 2008-11-19 | Jack-Up Offshore-Plattform und Verfahren |
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Publication Number | Publication Date |
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EP2189575A1 EP2189575A1 (de) | 2010-05-26 |
EP2189575B1 true EP2189575B1 (de) | 2021-06-30 |
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EP08169404.4A Active EP2189575B1 (de) | 2008-11-19 | 2008-11-19 | Jack-Up Offshore-Plattform und Verfahren |
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US (1) | US20110017695A1 (de) |
EP (1) | EP2189575B1 (de) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3034451A1 (de) * | 2011-12-30 | 2016-06-22 | National Oilwell Varco, L.P. | Tiefwasser-gelenkauslegerkran |
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CN113090470B (zh) * | 2021-04-13 | 2022-07-12 | 保利长大工程有限公司 | 一种海上风机的安装方法 |
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Also Published As
Publication number | Publication date |
---|---|
US20110017695A1 (en) | 2011-01-27 |
EP2189575A1 (de) | 2010-05-26 |
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